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k I o t z 0 1674, 0associates <br />1160 Dairy Ashford, Suite 500 <br />Houston, Texas 77079 <br />T 281.589.7257 F 281.589.7309 <br />houston. off ice@klotz. corn <br />31.r. Ron Bottoms <br />City Manager <br />City of La Porte <br />604 W. Fairmont Parkway <br />LaPorte, Texas 77571 <br />RE: City of LaPorte, Texas <br />City Wide Drainage Study <br />Draft Study Letter Report #3 <br />Klotz Associates Project No. 0127.008.000 <br />Klotz Associates, Inc. was authorized to proceed with the City Wide Drainage Study <br />(CWDS) for the City of La Porte (City) on January 28, 2008. Letter Report No. 1 and <br />Letter Report No. 2 for this study have been previously submitted and accepted by the <br />City. Klotz Associates is submitting this Letter Report No. 3 to present the results of <br />tasks 4.1 to 4.4 of our Scope of Work. <br />1. Purpose <br />The purpose of tasks 4.1 to 4.4 of the CWDS is to 1) define standards and criteria <br />for the CWDS, 2) prioritize drainage and flood control problems, �) identify <br />conceptual solutions to high priority problems, and 4) identify funding sources for <br />drainage projects. <br />Discussions about criteria and standards as well as recommendations made in this <br />report are for new development and areas of redevelopment. <br />The City provides road sided ditches and culverts and stor -in sewer design criteria <br />for new construction perforined within the City's jurisdiction in Chapter 5, Storm <br />Sewer Design Criteria (see Appendix A), of its Code of Ordinance. These storm <br />drainage criteria cover the design of new drainage facilities such as storm water <br />drainage systems and storm water detention ponds, along with a summary of the <br />accepted method of calculating peak flow and detention volume. <br />The City currently requires that construction of new roadside ditches and storm <br />sewer facilities convey the 3-year storm. For drainage areas greater than 100 <br />